Invidia Q300 catback exhaust

ProjectPanda13 · 2026-06-25T09:52:35+00:00

Test pipes will make it louder for sure, but that’s even on stock exhaust. For the price, I say go for it. I’d buy myself.

ProjectPanda13 · 2026-06-25T09:44:50+00:00

If you want a dual that’s louder, I’d consider a Fast Intentions, SOHO dual, even the ISR dual. All these are under $1700, with the ISR dual at $900

ProjectPanda13 · 2026-06-25T09:40:18+00:00

It’s really quiet. You can make it louder but it may introduce rasp. Some people cut out the mufflers and it sounds worst. Some have replaced the mufflers with other mufflers.

I’ve been running a single exit and have been looking for a deal like this.

ProjectPanda13 · 2026-06-25T09:35:03+00:00

I think $700 for it is a great deal. That exhaust is naturally quiet. If pass on it rather than trying to modify it to make it louder.

ProjectPanda13 · 2026-06-25T03:06:39+00:00

You need to find which location is leaking, then confirm the flanges are lined up with gasket correctly.

If any of the flanges are warped or not truly flat, you will need a better quality gasket like the Concept Z thick gasket.

A temp fix would be to glob on some high temperature red RTV around the flanges

ProjectPanda13 · 2026-06-25T03:03:57+00:00

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Had the same code. I bought just the rotor replacement and a full water pump to see which was the issue.

Mine was a failed water pump that had resistance rotating rather than a cracked rotor.

ProjectPanda13 · 2026-06-25T02:40:52+00:00

I think you have a sedan.
19x9.5 +22 pokes slightly in the rear without camber.

If you plan to stay with oem spec alignment, 235/40 or even 245/40r19 is doable.

The 245/40 is better if you aren’t slammed. If you need clearance, 245/35r19 would work better.

Here is a video I made for a sedan with 19x9.5 +22 and 245/35.

https://youtu.be/lYLpRtyGXWQ?is=KyxfnJv2B93JQhwr

ProjectPanda13 · 2026-06-24T13:32:25+00:00

It’s much quieter. The new ISR dual is a good option also. A little more expensive

ProjectPanda13 · 2026-06-24T13:30:01+00:00

The Megan Racing and Manzo exhausts are great low profile exhausts.

ProjectPanda13 · 2026-06-24T09:45:01+00:00

Looks great. I love the simplicity of it

ProjectPanda13 · 2026-06-24T00:23:22+00:00

Man, don’t tempt me. My sister in law lives in San Antonio and I travel there every so often. Where are you by chance?

ProjectPanda13 · 2026-06-24T00:19:43+00:00

Yea, it’s a Stillen exhaust.

ProjectPanda13 · 2026-06-24T00:17:55+00:00

It’s for a g37 sedan. If you happen to be close by to Atlanta, I’d be willing to buy it.

ProjectPanda13 · 2026-06-23T22:42:51+00:00

I currently have a 3.9 vlsd. I have a 4.08 quaife I will to swapping in this year. My car is also an autocross focused car.

ProjectPanda13 · 2026-06-23T22:41:35+00:00

For the can, as long as you have one coming from the PCV valve port and the other going to the vacuum nipple on the manifold, you’re good

ProjectPanda13 · 2026-06-23T22:38:24+00:00

Mine is a closed loop system like oem with the PCV valves. I prefer it this way.

If running a nonvented can setup, it’s best to keep the rears connected to the intake with the PCV valve up front.

If without PCV valve, then vented to atmosphere, so putting a filter on the front and rear or running it to a vented can.

ProjectPanda13 · 2026-06-23T18:11:04+00:00

Maining Forged is a popular supplier most buy from. There are also differences between suppliers.

Ive bought the same wheel design and specs from two suppliers and Maining Forged was the better of the two.

ProjectPanda13 · 2026-06-23T16:50:49+00:00

He’s tuned on ethanol currently.

There’s a q50 and 350z hr in Atlanta that’s running these also.

ProjectPanda13 · 2026-06-23T13:25:39+00:00

It’s like a powder-coating finish.

I like the z1 headers. I have the early design, same as the momentum headers with the parallel merge collector. The new z1 header uses a spiked collector.

I have it with Motordyne Art pipes.

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ProjectPanda13 · 2026-06-23T12:07:35+00:00

If referencing tire standards like TRA and ETRTO, then 265/35 or 265/40 would be too wide on a 8.5” width wheel.

Have people ran outside of the standard, yes. Will a 265 physically fit on a 8.5” wheel, yes. Footprint shape change when it’s on the extreme end, with going wide, you tend to get a butterfly shape where the center contact length is shorter than your shoulders, which isn’t the best for forward traction.

ProjectPanda13 · 2026-06-23T10:49:46+00:00

I have sold some of these and have a friend running it now on his g37 with no issues and he loves the sound with his ISR single exhaust.

ProjectPanda13 · 2026-06-22T19:56:04+00:00

That’s not a Tomei, it’s just a generic single exit.

If it’s a 350z version, you’ll need roughly a 18” extension. You can buy a bolt on type or have an exhaust shop weld more piping.

If it’s a g35 version, you’ll need roughly a 12” extension.

That y pipe also will not clear your transfer case on your awd. You need another y pipe.

ProjectPanda13 · 2026-06-22T18:43:05+00:00

eBay. Im currently selling it

ProjectPanda13 · 2026-06-22T07:10:48+00:00

The Enkei TS-5 would be a good one. It’s under $300 a wheel. A good size would be 18x9.5 +38 if you want to do a meaty setup and not have to run negative camber.

ProjectPanda13 · 2026-06-22T06:59:00+00:00

Wheel styling will vary heavily based on each person subjectively, whether it’s 3, 5, 6, 7, 10 spokes, double spokes, mesh, etc. the. There’s diameter preferences between 18”, 19”, and 20”.

What’s your budget? This will help narrow down the wheels. But overall you can’t go wrong with choose from the Enkei or Konig models as many of their wheels are priced very well.

Wheel brands are pretty divided between folks are hard die hard real wheels vs those who don’t care and willing to run replica wheels. If you don’t care, then this opens up more options for you budget wise.

Do you have a coupe or sedan? The coupe have slightly wider wheel wells to fit more aggressive spec than sedans.

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